Peter fyfe



(No Model.)

P, FYPE.

STEAM TRAP.

Patented Mar. 27, 1888.

UNiTED STATES PATENT rmcn,

PETER rvrn, or GLASGOW, COUNTY or LANARK, scornnnn.

STEAM-=TRAP...

SPECIFICATION forming part of Letters Patent No. 380,281, dated. March27, 1888. Application flled December 6,1887. Serial No. 257,142. (Nomodel.) Patented in England November 10, 1887, No. 15,345.

To aZZ whom it may concern:

Be it known that 1, PETER FYFE, a citizen of the United Kingdom of GreatBritain and Ireland, residing at Glasgow, in the county of Lanark,Scotland, have invented new and useful Improvements in Steam-Traps, (forwhich Letters Patent No. 15,045 were granted to me in Great BritainNovember 10, 1887;) and I do hereby declare that the following is afull, clear, and exactjdescriptiou of the invention, which will enableothers skilled in the manufacture or art to which it relates to make anduse the same.

My invention relates to improvements in steam-traps, whereby such trapsare rendered intermittent in action as regards the discharge of wateraccumulating therein, the water being automatically blown off at thefull bore of the outlet-valve, instead of as in ordinary traps, aconstant drip, accompanied by the escape of steam, taking place.

As represented in longitudinal vertical section at Figure 1, incrosssection at Fig. 2, and in plan with the top part or cover removedat Fig. 3 of the annexed drawings, the improved sLeani-trap'consists ofa covered casing, A, which is divided by a web, A, and disk H into threecompartments, B, O, and D, to the main one, B, of which the water andsteam from the pipe or vessel to be drained is admitted by an inlet, E,while the second one, 0, serves as an outlet for the water'dischargedfrom the first, and the third compartment, D,is intermittently andautomatically placed in communication with the steam-space of thefirst-mentioned compartment, in the manner hereinafter described, forthe purpose of opera-ting the discharge-valves. Toward its lower end theweb A extends intolthe compartment (3, and has fitted in it a tube, F,forming a seat for a valve, G, through which, when it is raised, thewater in the compartment B is discharged, the water passing out by smallorifices f in the lower end of the tube F. Between the compartments 0and D an elastic disk or diaphragm, H, preferably of metal, is secured,and upon the admission of steam under press ure to the compartment Dthis disk H bears down upon a flangedpiece, g, which is screwed orotherwise adj ustabl y attached to the upper end of the valve-spindle g,and thereby closes the valve, while upon the discharge of the steam fromthe compartment D and the pressure upon the disk H being relieved thevalve is raised by the pressure of the steam upon the surface of thewater in the compartment B, and permits of the escape of the water,which, being discharged under pressure, may be led to a point at ahigher level. The alternate admission and discharge of the steam to andfrom the compartment D to control the operation of the valve G areeffected by a three-way cock, I, placed in the pipe J, which constitutesthe means of communication between the compartments B and D, the saidcock I being operated by a lever, K, having attached to it a float, L,which rises and falls with the variation of level of the wateraccumulating in the trap. YVhen the waterlevel in the trap is low andthe floatis in the position indicated at Fig. l, the chambers B and Dare in communication through the pipe J, the cock L being in a positionto allow free passage of steam, and the discharge-valve G is keptclosed; but upon the water rising to the level indicated by the dottedline the cock I is by the action of the float L and lever K turned to aposition in which such communication is closed and the compartment D isopen to the atmosphere, the steam in said compartment escaping throughthe cock I and a branch pipe, J. The pressure upon the disk H beingrelieved, the valve G is opened and the water forced out of the trapuntil the level is reached, at which the float in sinking turns the cockI to close communication with the atmosphere and open communicationbetween the compartments B and D. The valveGr being thereupon firmlyclosed, the discharge of water ceases.

Having now particularly described the invent-ion, what I desire to claimand secure by Letters Patent is- 1. In a steam-trap, the combination ofthe water and pressure chambers B D, the former provided with adischarge-valve, and having in it a float operating a cook or valve in apipe communicating with the pressure-chamber, and the said chamber Dhaving a disk or diaphragm bearing on the discharge-valve and acted onby variations of pressure produced by the operation of said cock,substantially as described.

2. In a steam-trap, the combination, with the disohargevalve, of thepressure-chamber I D, provided with a disk or diaphragm bearing on saidvalve, and a three-way cock, I, controlled by a float in the trap foroperating the said valve, substantially as hereinbefore described.

3. The combination, with a casing having l ports, and a web withopenings therethrough, I dividing said easing into compartments, a

valves in said openings adapted to be operated alternately by saiddiaphragm and float, for the purpose set forth.

In witness whereof I have hereunto set my I 5 hand and seal this 5th dayof November, 1887. PETER FYFE. [1 s.]

Witnesses:

GEO. M. CRUIKSHANK, WALLACE FAIRWEATHER,

flexible diaphragm dividing one of said com Both Fel. Inst. PatentAgents, 62 St. Vincent Street, Glasgow.

partments between said openings, a float, and

